Question

A gardener crosses tall true–breeding pea plants with short true–breeding ones. Tall plants are dominant to short ones. He collects the seeds to grow F1 plants and then allows them to self–pollinate to form an F2 generation. Which of the following describes the traits of the offspring correctly?


A.Three–fourths of the F1 and one–half of the F2 plants will be tall.
B.All of the F1 and three–fourths of the F2 plants will be tall.
C.Three–fourths of the F1 and all of the F2 plants will be tall

Answer 1

Not sure about where did you collect the seeds.

But all of the F1 should be tall because the tall plants are dominant originally

F2 will have 3/4 to be tall, assuming this genetic case is determined by only one factor, like Aa

Answer 2

Answer:

Option (A).

Explanation:

Mendel is known as the father of genetics. He explained the lwas of independent assortment of genes and the laws of segregation while working on the pea plant.

The tall plant is dominant over the dwarf plant. Let the genotype of tall plant be T and dwarf plant be t. The cross between TT and tt result in the F1 generation will all tall plants (Tt). The selfing of F1 plants generate F2 plants TT, Tt, Tt ( tall plants ) and tt (dwarf plants). Hence, all F1 plants are tall and 3/4 of F2 plants are tall.

Thus, the correct answer is option (B).